Vaxve tappet



April 6 1926. V 1,579,850

. A. WITTIG VALVE TABPET Filed Jan. 13 1925 w M "7////////% Q22 /Z/ /7IIIIMHHIWENII "mu 5 IlllllllliHllHllHl zz w Patented Apr. 6, 1926.

UNITED STATES- ARTHUR WITTIG, OF WEST AIJLIS, WISCONSIN.

VALVE TAPPET.

Application filed January To all wliom it may concern:

Be it known that I, ARTHUR WITTIG, a

citizen of the United States, and resident of West Allis, in the countyof Milwaukee and State of WVisconsin, have invented certain new anduseful Improvements in Valve Tappets; and I do hereby declare that thefollowing is a' full, clear, and exact description thereof.

This invention relates to valve tappets.

Objects of this invention are to provied a valve tappet constructionwhich is noiseless, which will automatically take up wear or com ensatefor variations in relative length of t e parts of the engine due toheat, and which prevents sudden shocks being applied to the valve andassociated parts.

Further objects are to provide a valve tappet construction which issimple and may be easily applied to standard types of gas engines, and1n which there are a small number of parts.

Embodiments of the invention are shown in the accompanying drawings, inwhich Figure 1 is a side elevation partly in section showing one form ofthe invention.

Figure 2 is a v'ew of a further form.

Figure 3 is a view of a still further form.

Figure 1, showing the first form of the invention will first bedescribed. In this form of invention the valve rod or push rod 1 extendsto a point beneath the rock arm 2. The upper end of the valve rodcarries a cup-shaped cap 3 which receives such end. This cap is providedwith a flange 4, and

such flange fits within a relatively large aperture 5 formed in a cover6. This cover is provided with an inwardly turned flange 7 which isapertured to receive the main body of the cap 3. A helical spring 8 isinter osed between the flanges 4 and 7. If desire the inner edges 9 ofthe external shell 6 may be spun inwardly to retain the device in itsassembled condition.

In operation, the spring 8 serves to cushion the valve rod and tomaintain the member 6 in contact with the rock arm or tappeting arm 2 atall times. Further, when the temperature of the engine varies andrelative elongation of theparts takes place, the spring 8 willcompensate for suchvariatron.

It is tobemoted that-the spring .8. revents the suddenrtransnfissipn'ofviolent-s ocksto the tappet arm, or lever .2 and OthBI'WISB 18, 1925.Serial No. 2,130.

cushions or smooths the action of this valve rod, or'push rod.

Figure 2 shows a further form of the invention in which the push rod 10carries a shell 11 similar to the cap 3 previously described. This shellis similarly provided with an outturned flange 12. It fits within anouter shell 13 and such outer shell has a reduced aperture 14 whichreceives main body of the cap 11, as shown in Figure 2. A helical spring15 is' interposed between the flange 12 and the shoulder 16 of the shell13. Preferably, the shell 13 is provided with an imperforate flat outerface 17 which cooperates with the cam 18.

The action of this device is substantially the same as that of thedevice shown in Figure 1. If desired, the edges 19 may be spun inwardlyto maintain the assembly of the device.

In the form shown in Figure 3 an extension push rod 20 is employed andcarries a cap 21 at its lower end provided with an outwardly projectingflange 22 similar to the constructlons previously described. However,the lower portion 23 of the push rod is threaded and adjustably receivesthe shell 24, such shell having a shoulder 25 and a reduced portion 26within which the main body of the cap 21 is adapted to slide. A

helical spring 27 is interposed between the shoulder 25 and the flange22 and operates in the manner previously described.

It is to be noted that the shell 24 is adjustably carried b a threadedstem 28 which is screwed into t e end of the member 23 and locked inplace b means of a suitable lock nut, as shown. if. desired, the upperedges of the shell 24 may be spun inwardly to maintain the assembly ofthe parts.

It will be seen that a tappet construction for engines has been providedwhich is substantially noiseless, which is smooth in its action, andwhich materially lessens the wear on the valve and associated parts.

Although the invention has been described in considerable detail, it isto be understood that the invention may be variously embodied and is,therefore, tobe limited only as claimed.

I claim;

1. In a tappet construction for engines,

- the combination of apush rod, aoa havmg a -sockethousing the end ofsaid re ,a pressure transmitting shell surrounding said.

socket, and a spring interposed between said socket and said shell, saidshell having an inwardly spun portion for retaining said ca 5. In atappet construction for engines, the combination of a push rod, a caphaving a socket housing the end of said rod and having a body portionand an outwardly projecting flange, a pressure transmitting shellslidably holding said cap with the flange slidably contacting with itsinner surface, said shell having an inwardly extending portion guidingthe body portion of said cap, and a spring interposed between saidflange and said inwardly extending portion.

3. In a tappet construction for engines, the combinatlon of a having acylindrical body portion terminatmg in an outwardly projecting flange, apressure transmittting shell having a cylindrical aperture receivingsaid flange and having a cylindrical aperturerreceiving the cylindricalbody portion of said cap, and a spring interposed between the flange ofsaid cap and said shell and urging said cap and shell apart.

In testimony that I claim the foregoing I have hereunto set my hand.

ARTHUR WITTIG.

, push rod, a cap having a socket housmg the end of said rod and

